Viola Jones & Philip Wolny 
Primary Source Investigation of the Underground Railroad [PDF ebook] 

In the decades before the Civil War effectively ended the institution of slavery in the United States, many people risked their lives to rescue Southern African Americans from the shackles of slavery and shepherd them to the safety of the Northern states and Canada. Thousands of slaves made the journey under cover of night. Once free, some became agents of the railroad while others educated those in the North about the horrors of slavery. The remarkable stories of people who would achieve freedom or die trying are chronicled within these pages.